/* 清除浏览器默认样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html, body {
  height: 100%;
  font-family: Arial, Helvetica, sans-serif;
  background: #fff;
}
ul, ol {
  list-style: none;
}
a {
  color: inherit;
  text-decoration: none;
}
img, svg {
  display: block;
  max-width: 100%;
  height: auto;
  border: none;
}
button, input, textarea, select {
  font: inherit;
  background: none;
  border: none;
  outline: none;
  box-shadow: none;
  appearance: none;
}
table {
  border-collapse: collapse;
  border-spacing: 0;
}